sure remove it and increase her gun dmg. 
not sure what you hope for a blank nerf? to a underperforming hero?
also ask how mercy feels now that everyone regenerates hp.
I wouldn’t mind no longer having to hack first to get any dmg in. basically announcing “Hey, I will shoot you in about 1.5sec get ready”
would prefer only needing hack if I want to cancel a ability like coal or interrupt deflect.